Thanks for the help but I am confused on some parts. I can use uv's that are out of the bounding box in a game engine? I didnt think that was possible. For example: UDK?
Yep, it gets used all the time, especially in UDK. This was an example I found on the web, so ignore the writing and take notice of the pink box. It's the 0-1 bounding box space. The UV editor background has been set to display the tiling texture. With a light map you don't nessesarily need to create a secondary UV channel…